Problem

A 36N force is needed to start a 7.0 kg box moving across the floor. If the 36.0 N force continues, the box accelerates at 0.70 m/s^{2}. What are the coefficients of static and kinetic friction?

A

μs = 0.52 ; μk = 0.64

B

μs = 0.64 ; μk = 0.64

C

μs = 0.52 ; μk = 0.45

D

μs = 0.45 ; μk = 0.32

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